Spark-plug attachment for pumps.



H. F. SADGEBURY.

SPARK PLUG ATTACHMENT FOR PUMPS.

APPLICATION FILED FEB. 4. 191-4.

Patented J um; 18, 1918.

HERMAN 1E. SADGEBURY, OF DAYTON, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO

WOLVEBINE SPARK PLUG COMPANY, INC., A CORPORATION OF NEW YORK, (INCOR- IE'OBATED IN 1916.)

SPARK- PLUG ATTACHMENT FOR PUMPS.

Specification of Letters Patent.

Patented June 1%, 191m.

Application filed February 4, 1914-. Serial No. 816,524.

7 '0 all whom it may concern:

Be it known that I, HERMAN F. Swen BURY, a citizen of the United States, resid ing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Spark- Plug Attachments for Pumps, of which I declare the following to be a full, clear, and exact description.

This invention relates to improved means for connecting an air pump to an internal combustion engine, and more particularly to the gas engine of automobiles, motorcycles and the like, for the purpose of effecting the operation of the pump by the engine to inflate the tires.

It was the principal object of this invention to provide means whereby a diiferential air pump may be quickly and with extreme case attached to a part of a spark plug attached to the engine, without the necessity of employing any tool such as a wrench. It is obvious that such an invention is a distinct improvement ove the present forms of devices now on the market, as the attachment of the pump is effected in a simpler and easier manner, and as the connection is accomplished without the use of a tool considerable time and inconvenience is saved.

In the present form of embodiment the invention is shown applied to a spark plug such as that shown and described in the present applicants application, Serial No. 660,059, filed November 13, 1911. The spark plug is only claimed herein in combination with the present invention. The spark plug, shown in the above mentioned application, consists mainly of three parts, namely, a bushing adapted to be screwed into a threaded openin in the engine easing, a detachable core, which serves as an insulator, and an cecentrically turned pin for holding the core firmly in place in the bushing. The present improvement consists of a hollow cylindrical member either integral wlth or removably connected with an air pump and which can be inserted into the bushing of the spark plug after the core has been removed and can be fastened into place in the bushing by the eccentric pin in the same manner that the core is fa stened thereto. The cylindrical member is either a part of or connected, to

the pump and when the member is seated in the spark plug bushing and the engine operated by other cylinders, the gas is forced up through the member to operate the pump whereby the pump forces air through a tube into the tire attached thereto to inflate the latter.

With these and incidental objects in view the invention consists in certain novel features of construction and combination of parts, the essential elements of which are set forth in appended claims and a preferred form of embodiment of which is hereinafter described with reference to the drawings which accompany and form part of this specification.

Of the drawings,

Figure 1 is a side elevation of a spark plug which is shown and described in the above mentioned application and to which the present invention is applied.

Fig. 2 is a side elevation of the improved device forming the subject matter of this invention, part of the device being broken away to disclose the construction of the same more clearly to View.

Fig. 3 is a side elevation showing the manner in which the device may be attached to the auxiliary air pump, and the bushing of the spark plug parts being broken away to disclose more clearly the manner in which this attachment is efiected.

Fig. 4 is a side elevation of the spark plug shown in Fig. 1 and taken at right angles thereto.

The spark plug shown in Figs. 1 and i has been fully shown and described in the aforesaid application but a brief description of the spark plug will however be given here. The bushing 1 is provided with a screw thread by which the bushing may be screwed into a threaded openin or socket in the engine casing. The inner diameter of the portion of the bushing above the threads is of greater diameter than the inner diameter of the threaded portion of the bushing and their junction forms a seat for the core 2 which carries electrodes 3.

An eccentric pin 4 is employed to retain the core in the bushing. A. gasket 5 is compressed between the shoulder 6 on the core and the seat 7 on the bushing. The eccentric pin passes through diametrically opposite transverse hearings in the bushing and a transverse opening in the core. The eccentric portion on the pin is diametrically opposit the direction of the handle of the pm so that when the handle'is in the position shown in Figs. 1 and 3 the greatest downward pressure of the core is exerted on the washer to prevent leakage of the combustible gases of the engine. To remove the core from the bushing the handle is given about one half of a rotation and the pin is axially withdrawn from its transverse bearings in the bushing and the transverse opening in the core. The core may then be lifted out of the bushing.

The means for connecting the pump to the bushing of the spark plug consists of a cylindrical casing 8 having integral with its top an externally threaded hollow 'cy lindrical portion 9. As shown in Fig. 3, the threads of the portion 9 of the casing are adapted to cooperate with the internal threads of the lower portion of the air pump. In practice, it would, of course, be preferable to have the casing constantly screwed to the pump. However, it is not necessary to'restrict the manner of connection between the casing and the pump to this means. They may be integral or any other appropriate means may be used.

1 preferably have formed integral at the bottom of the casing 8 a hollow cylindrical portion 11 which is of such outside diameter as to be able to fit into the inside diameter of the threaded portion of bushing 1. The interior of the casing is provided with a tubular element 10 which passes transversely through diametrically opposite and circular openings in the casing. The tubular element is counter-bored at both ends, such that the central portion intermediate the ends of the inside of the element is of less diameter than the diameters of the remaining portions of the inside of the tubes. The element 10 is so restricted at the center so that when the pin engages with the tubular element, as hereafter described, the pressure of the pin on the casing is localized over a small area at the axis of the casing and the latter will rest on the washer 7 with uniform pressure at all points. This result may be attained by other means than by counterboring the ends of element 10, as any means whereby the pressure of the pin is localized at the axis of the casing may be used. The ends of the element 10 are rigidly mounted in these openings and in an air tight manner such as by brazing to prevent leakage of the gases and are flush with the cylindrical surface of the casing so that the casing may be inserted in the bushing.

The casing 8 being hollow, forms a passage for the gases from the cylinder of the engine to the auxiliary air pump, the gases passing around and on either side of the tubular element 10.

To insert the casing the core of the spark plug is removed from the bushing in the manner described above. The casing is then inserted so that the eccentric pin may be passed through the bearing on the right hand side of the bushing (Fig. 3) and through the tubular element so that the restricted left hand end of the pin will be seated in the other bearing in the bushing. In inserting the pin the handle is in a downward position, since the greatest throw of the eccentric on the pin is diametrically opposite to the position of the handle. After the pin is inserted the handle of the pin is turned upright (the positions shown in the figures) and the eccentric portion of the pin engages the bottom of the tubular member 10 midway between the ends. The casing is thereby firmly forced against the washer 5 so as to form an effective gas tight contact between the casing and bushing.

When the pump 12 attached to the upper end of the casing is then connected as de scrioed and the engine is operated, the pres sure of the cylinder of the engine to which the auxiliary pump is attached is transmitted through casing 8 and operates a piston in the auxiliary air pump.

The piston, through its oscillatory rectilinear motion within the cylinder of the engine to which the pump is connected, acts as a pump and operates an auxiliary air pump. The remaining cylinders of the engine are operated in the usual way and the pressure due to the internal combustion of the gases in them, serves as the motive power for the operation of the piston in the first mentioned cylinder. The pump preferably to be used is to take in air from the surrounding atmosphere and forces it through the rubber tube 13 which is to be attached to the air valve of the tire and in this way inflates the tire. It is obvious that after the tire is inflated the casing may he removed and the core again inserted in the bushing so that the spark plug may perform its usual service.

The pump 12 shown in the drawings is of a well known form and not being essential to the understanding of this invention is not shown and described in detail in this application. It is to be understood that any forn'i. of pump whatever may be enniloyed and it may either be integral with or merely attachable, as shown, and it is not intended to limit the claims appended hereto to the combination with the particular arrangement shown as the showing in this respect is for illustrative purposes only.

While the form of mechanism herein shown and described is adn'iirably adapted to fulfil the objects primarily stated, it is to be understood that it is not intended to con- 13 line the invention to the one form of embodiment herein described, for it is susceptible of embodiment in various forms all coming within the scope of the claims which follow.

What I claim is 1. In combination, a hollow spark plug bushing forming an annular seat, a hollow removable member adapted to seat therein and adapted to be connected to a pump, and means including a member rotatable about an axis at substantially right angles to the axis of the spark plug bushing, for forcing the removable member to the seat, said means and said member being so constructed and arranged that pressures applied to the seat at points adjacent the corresponding end portions of the rotatable member are maintained substantially equal under all conditions, whereby compensation is made for slight inaccuracies in construction or for the presence of foreign material.

2. In devices of the class described, the combination of a hollow bushing adapted to be removably secured in an opening in an engine cylinder; a hollow casing adapted to reinovably seat in the bushing; an open ended tube adapted to extend transversely through the casing; and a rotatable member jo-urnaled in the bushing and extending into the tube and having a portion extending into the tube with a periphery points of which are greater distances from the axis of the rotatable member than are other points so that upon rotation of the rotatable mem her the latter will engage the bottom of the tube in the casing and force the latter to its seat in the bushing.

3. In a device of the class described, the combination ofa hollow spark plug bushing; a removable hollow member provided with a transverse tube passing from outside periphery to outside periphery of the memher, the member having a seat formed near one end adapted to rest on a shoulder in the bushing; and a rotary member j ournaled in the bushing and having a portion whose periphery extends farther from the aXis of the bearings at some points than at others for cooperating with the hollow removable member to force the latter to its seat in the bushing when the rotatable member is rotated.

4. In devices of the class described the combination of a hollow bushing, a hollow open ended casing adapted to seat in the bushing, an open ended tube which is adapted to extend transversely through the casing and having a restricted portion, and a rotatable member journaled in the bushing and having a portion extending into the tube with a periphery points of which are greater distances from the axis of the bearings than are other points so that upon rotating the rotatable member the latter will engage the bottom of the tube at its restricted portion and force the casing to its seat in the bushmg.

5. In devices of the class described, the combination of an open ended hollow cylindrical member having an annular seat, a second hollow member open at both ends and adapted to fit into the first hollow member and to seat therein, and means for forcing the members together, said means including a rotary member journaled in bearings in the first hollow member and arranged to turn about an axis at substantially right angles to the axis of said first hollow memher, said means and said member being so constructed and arranged that substantially all pressure is transmitted from said rotatable member to the second hollow member substantially in the axis of the first hollow member, whereby the second member may tilt about an axis at right angles to that of the rotatable member to maintain equal pressures on opposite sides of the seat.

6. In combination, an open ended hollow cylindrical member having an annular seat, a second hollow member open at both ends and adapted to engage said seat, means for forcing the second hollow member into engagement with the seat, said means including a force applying member, said second hollow member having a universal swinging connection with the force applying member substantially in the axis of the first mentioned member, whereby the pressures on the seat at the ends of any given diameter thereof are maintained substantially equal.

7 In a device of the class described, the combination of a spark plug bushing having an internal shoulder and transverse bearing openings in its walls; of a pump having a hollow end adapted to seat against the shoulder in the bushing; a tube extending through the hollow end of the pump; and a removable rotatable fastening member seated in the bearing openings in the bushin and extending through the tube for holding the end of the pump against its seat in the shoulder of the bushing.

8. In a device of the character described, the combinationwith a bushing having an interior seat, of a hollow removable member adapted to cooperate with said seat and constructed to be connected with a pump, said member being provided with a gas tight tube extending transversely through the member, and an eccentric bearing element to be inserted through openings in the bushing and said tube and then rotated to cause the eccentric to clamp the hollow member against the seat in the bushing.

9. In combination, tubular male and female members adapted to seat one in the other to form a tight sealed joint capable of withstanding high pressures, one of the members being a threaded spark plug bushing adapted to be screwed into a socket in an internal combustion engine casing, said members together forming a passage through which pressure from the engine may be transmitted, and a fastening member rotatable in respect to the tubular members and having a cam portion engaging one of said members within the confines of' and along a diameter of said tubular members, whereby, when the rotatable member is rotated, the tubular members are forced in tight seating relation with one another.

10. In combination, tubular male and female members adapted to seat one Within the other to forma joint capable of withstanding high pressure, one of the members being a spark plug bushing adapted to be secured in a socket in an internal combustion engine, said members inclosing a passage through which pressure from the engine may be transmitted, a rotatable fastening member removably ournaled in one of said tubular members and having a cam portion adapted to co-act with the other of said tubular mem bers to force the tubular members firmly together when the rotatable member is rotated, said rotatable member extending through both of said tubular members.

1 11. In a device of the class described, tubular male and female members adapted to seat one in the other, and a fastening member rotatable in respect to said tubular members about an axis at right angles to the common axis of the tubular members, and means whereby pressure from said cam member is distributed substantially equally in both tubular members toward the end portions of the cam member to cause equal bearing pressures on the seat at points adjacent the ends of the cam member regardless of slight inaccuracies in construction or of the presence of small pieces of foreign material.

12. In combination, tubular male and female members adapted to seat one in the other to form a tight sealed joint capable of withstanding high pressures, one of the members being a spark plug bushing for an internal combustion engine and said members together forming a passage through F which pressure from the engine may be transmitted, and a rotatable fastening me1nber removably journaled in one of said members and co-acting with the other of said members to apply pressure thereto in a direction substantially in alinement with the axis of said member to force said members firmly together when said rotatable member is rotated.

In testimony whereof I aflix my signature in the presence of two witnesses.

HERMAN F. SADGEBURY.

CHESTER H. BRASELTON.

(Ionics or! this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

, Washington, D. G. 

